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Subsequent events
6 Months Ended
Jun. 30, 2020
Subsequent Events [Abstract]  
Subsequent events Subsequent events
MidCap Credit Facility Termination
On July 1, 2020, the Company terminated the Credit Facility. In connection with the termination of the Credit Facility, the Company repaid outstanding principal and accrued interest thereunder totaling $18.4 million and paid an additional $0.6 million in termination and exit fees. All liens and security interests securing the term loan made pursuant to the Credit Facility were released upon termination.